Finding a cute plushie of Metagross would be a pretty difficult task lol. Metagross is supposed to look intimidating and not cute in the slightest, so most official stuff would just be like that. It's even hard to find cute fanart of it, so good luck with finding a cute one xD

Apart from the first picture which is typical Pidgey Angry Birds face, I find this plushie to be a pretty cute Pidgey.